【正确答案】 D

【答案解析】见Paragraph 1: In the mid-to late 1990's, industry associations responded to the growth of environmental concerns and the rise of ecotourism by instituting certain changes that, when examined closely, often amount to promoting minor, cost -- saving environmental reform -- ecotourism lite-rather than seriously grappling with the principles and practices of ecotourism.

【正确答案】 A

【答案解析】见Paragraph 2。

【正确答案】 B

【答案解析】见Paragraph 3: Much of what is marketed as ecotourism is simply conventional mass tourism wrapped in a thin veneer of green.

【正确答案】 B

【答案解析】见Paragraph 3: Although it has won praise from zoo-industry officials, Animal Kingdom opened in mid 1988 amidst protests from animal rights groups and an investigation by the US Department of Agriculture into the deaths of some dozen animals, including representatives of endangered species, Two West African crowned cranes were Fun over by tour vehicles. 据此可以判断：A与原文内容不符，C在原文中没有提及，D与原文内容相反。